12538887 has 12 divisors (see below), whose sum is σ = 17479224. Its totient is φ = 7994800.

The previous prime is 12538873. The next prime is 12538891. The reversal of 12538887 is 78883521.

It is a happy number.

It is not a de Polignac number, because 12538887 - 2¹⁸ = 12276743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12538987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2364 + ... + 5537.

It is an arithmetic number, because the mean of its divisors is an integer number (1456602).

Almost surely, 2^12538887 is an apocalyptic number.

12538887 is a deficient number, since it is larger than the sum of its proper divisors (4940337).

12538887 is an equidigital number, since it uses as much as digits as its factorization.

12538887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7950 (or 7927 counting only the distinct ones).

The product of its digits is 107520, while the sum is 42.

The square root of 12538887 is about 3541.0290877088. The cubic root of 12538887 is about 232.3198558331.

The spelling of 12538887 in words is "twelve million, five hundred thirty-eight thousand, eight hundred eighty-seven".